On Mon, Jun 29, 2020 at 04:43:05PM -0700, Chaitanya Kulkarni wrote:

There are identical TRACE_EVENTS presents which can now take an
advantage of the block_bio_merge trace event class.

This is a prep patch which renames block_bio_merge to block_bio so
that the next patches in this series will be able to resue it.

The changes look good, but I'd merged it with the patches adding
actual new users (which also look good to me).